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Nortec GH Series Installation, User & Maintenance Manual

Gh series gas-fired humidifier
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GH Series
Gas-fired Humidifier
Version D
Installation, User &
Maintenance Guide
FOR YOUR SAFETY:
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this
or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electrical switch; do not use any telephone in your building.
Immediately call your gas supplier from a neighbor's telephone.
Follow the gas supplier's instructions. If you can not reach your gas supplier, call the fire
department.
WARNING:
Improper installation, adjustment, alteration, service or maintenance can cause injury or
property damage. Refer to this manual. For assistance or additional information consult
a qualified installer, service agency, or the gas supplier.
WARNING:
If the information in this manual is not followed exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
IMPORTANT: Read and save this guide for future
reference. This guide to be left with equipment owner.
Form #02-272
150-3230 rev. A

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  • Page 1 GH Series Gas-fired Humidifier Version D Installation, User & Maintenance Guide FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. WHAT TO DO IF YOU SMELL GAS: Do not try to light any appliance.

  • Page 2: Table Of Contents

    Table Of Contents GENERAL - WARNING ..........1 - RECEIVING &...
  • Page 3 - FILLING THE SYSTEM ........17 - TESTING THE IGNITION SAFETY SHUT-OFF .
  • Page 4 - GH ENCLOSURE PHYSICAL DATA ........32 - GH ENCLOSURE HEATER INSTALLATION INSTRUCTIONS .

  • Page 5: General

    MC = DI ITAL CONTROLLER c/w KEYPAD This installation guide has been designed to provide assistance when installing, mounting, and STEAM OUTPUT sizing a GH Series humidifier. Actual on site lbs/hr) Normal Altitude application may vary. Consult Technical Services or FUEL N= NATURAL AS your local NORTEC representative.
  • Page 6 MODEL GH 100 SPECIFICATIONS FUEL BLOWER INPUT (BTUH)* STEAM CAPACITY MANIFOLD PRESS. IN SHIPPING WEIGHT OPERATING SPEED (LBS/HR) W.C. (LBS) WEIGHT (LBS) NATURAL 119,000 119,000 -0.05 MIN (B,P) 60,000 60,000 -0.05 MIN (MC) 40,000 60,000 -0.05 PROPANE 119,000 119,000 -0.05 (LP GAS) MIN (B,P) 60,000...

  • Page 7: Locating And Mounting

    LOCATING AND MOUNTING temperature. GH Series humidifiers are designed to mount on a NOTE FOR OUTDOOR ENCLOSURE: suitable wall (GH 100 only), GH Stand, or floor. The Required free area of supply air is provided clearance dimensions shown in this manual are for through the bottom of the unit.
  • Page 8 Figure #2 RIGHT Front BOTTOM DV: Optional Direct Vent option **: Space required for combustion air below or at the back of the unit. increased static pressure (over 4.5" W.C.) will 7. Make sure humidifier is mounted level. If floor result in hot water leaking down the drain.

  • Page 9: Gas Piping

    8. Optional stands are available for all GH Series GAS PIPING humidifiers. Refer to Shop Drawing Package, Form # 273 for details and part numbers. Installation of piping must be in accordance with local codes, and ANSI Z233.1, “National Fuel Gas 9.

  • Page 10: Air Manifold/Connector Hose Installation For Direct Vent

    gas leakage. Seal all leaks before placing the installed by a qualified installer prior to commissioning humidifier in operation. the unit. WARNING: Never use an open flame to check for Procedure: gas leaks. If a leak does exist, a fire or explosion could occur, resulting in damage, injury or death.

  • Page 11: Intake Air Duct

    INTAKE AIR DUCT TERMINAL LOCATION All direct vent units require an intake air duct to The intake duct must terminate at an outside provide fresh outside air for combustion. location with the supplied vent terminal. Each air intake manifold has a single 4-inch The intake and vent terminals must be installed as (100mm) diameter inlet to which the supply air duct shown in Figure 7.

  • Page 12: Standard Unit

    28. Contact NORTEC each 45° elbow equals 5'. For lengths over 100’, for additional information. consult factory. Class B vent must not be used. Class “BH” vent Direct Vent Unit must be used based on list of approved manufacturers shown in the installation manual.

  • Page 13: Electrical

    Wiring is fed through a 7/8" hole on upper right 24 VAC Available hand side of control compartment. See figure Controls are available from NORTEC as 2. When installed, the appliance must be accessories and can be ordered with the humidifier. electrically grounded in accordance with local...

  • Page 14: Control Installation

    across these terminals to replace on/off controls and 3. Mount duct high limit humidistat downstream provide for constant operation. of steam distributors far enough that, under normal humidity and air flow conditions, steam Caution: Terminal 1 is the “hot” wire from the will have been fully absorbed (typically at least 24Vac control transformer;...
  • Page 15 of the location, amount of steam being unit to be fitted with an extended external introduced into the duct, downstream water trap. Consult factory. obstructions, and surfaces vulnerable to wetting. 7. Low temperature ducts below 60°F (15°C), shallow ducts, or branch ducts might require 3.

  • Page 16: Plumbing

    H 20" W 17" may be used with all models. Consult NORTEC representative for DI water unit. 5. Standard fill valves are sized for water pressure ranging from 30 to 80 psig (ideally 55 to 60 psig). For other pressures, consult factory.

  • Page 17: Drain Line

    3/8" OD and connect to the factory-supplied 3/8" olive compression fitting 1.75” Steam Hose on the side of the humidifier. The DWC fill by NORTEC valve should be supplied with a 3/4” fill (See Figure #17). Drain piping...

  • Page 18: Steam Line

    2. Do not install zone valves on steam lines. Improper adjustment will over-pressurize the Figure #23 gas humidifier 3. NORTEC steam supply hose or field-supplied piping should be sloped upwards from the humidifier to the steam distributors. Slope should be at least 2" in 12"(10 degree slope) to promote condensate runback.

  • Page 19: Water Trap

    3’ WATER TRAP Depth Of Trap "Y" Must Be 2" More Than 1. The GH Series humidifier produces steam at Duct Static Pressure atmospheric pressure. Pressure head must develop to push steam through supply line and Condensate Trap into air duct.

  • Page 20: Operation

    The unique design for the internal Drain Water through a solenoid operated valve. Cold fill water from Cooler from NORTEC will ensure water tempering at one of the fill valve outlets is routed through fill cup all times of the water going to drain. The fresh fill water and introduced to the bottom of the water tank.

  • Page 21: Start Up Procedure

    2. Blower pre-purges for 30 seconds. NOTE: On multi-blower models, it is START UP PROCEDURE necessary to wait for all blowers to cycle. Also see Startup Sheet on page 27. 3. After seven seconds the gas valve is energized for four seconds, then Prior to filling the unit, it is necessary to ensure de-energized.

  • Page 22: Sequence Of Operation

    SEQUENCE OF OPERATION available from NORTEC. Provided the necessary power, water, gas and If you are unaware of the hardness or silica vent connections are completed, the unit is started by content of your water supply, there are many “do it the activation of the on/off switch located on the front yourself”...

  • Page 23: Safety Instructions

    26. those used for gardening. Once loose scale is removed, use a scraper such as a plastic windshield Note: The water supplied to the GH Series scraper to remove scale adhering to the tank or contains minerals which continuously accumulate combustion chamber walls.

  • Page 24: Burner

    3. Remove blower. See Blower Removal Section. NOTE: Replacement igniters must be supplied by NORTEC or damage to the unit may occur. 4. Remove (5) burner flange mounting bolts. 1. Shut off electrical power and gas supply to the 5. Gently remove the burner assembly from the appliance.

  • Page 25: Air Switch Replacement

    3. Disconnect wiring connections from 3. Disconnect electrical plug connection to transformer leads labeling as required. blower motor. 4. Remove screws (2) holding transformer. 4. Disconnect the pressure hoses at the air proving switch. 5. Reverse above procedure to re-install. 5.

  • Page 26: Heat Exchanger Replacement

    13. Remove nuts which hold tank mount brackets 14. Disconnect the left end tank brackets from the frame. 15. Carefully slide tank out the left end of the casing. 16. Reverse procedure to replace tank. Inspect heat exchanger gasket to ensure it is not damaged.

  • Page 27: Servicing The Unit

    MC MODELS SERVICING THE UNIT Faults are indicated with a fault message on the Caution: Disconnect power before servicing this display of MC models. Refer to “GHMC Display Unit appliance. Operating Instructions” (Form #XX-274) for an Caution: Label all wires prior to disconnection explanation of fault messages.

  • Page 28: Igniter Check

    300 Ohm’s. This indicates the igniter is okay, otherwise it should be replaced. Gas Valve Setting The gas valves used in the GH series humidifier are negative-pressure-regulated valves. The valve setting listed on the product rating plate is shown relative to atmosphere – this setting will always remain constant.

  • Page 29: Troubleshooting Guide

    TROUBLESHOOTING GUIDE Symptom Causes / Service Checks On-off Switch Energized, Humidistat calling for - No power to appliance. Check circuit breaker. Check disconnect switch. operation. Unit does not operate. - Defective Transformer. Check secondary voltage. If no 24 volts, replace transformer if breaker is not blown.

  • Page 30: Mandatory Maintenance Schedule

    MANDATORY MAINTENANCE SCHEDULE 30 DAYS WHAT NEEDS TO BE DONE? END OF PARTS after initial SEASON REGULAR MAINTENANCE PREVENTIVE MAINTENANCE start-up Hot Surface - Check for continuity 50-300 ohms. Ignitor - Replace hot surface ignitor and flame sensor with replacement kit P/N 150-3884. - Check that Flame Sensor is straight.

  • Page 31: Start-Up And Inspection

    Vent Steam Outlet Date:_____________________________________ Power And Control Wiring Water Input Reference Order #:__________________________ Line Job Name:_________________________________ Line Gas Input Model:____________________________________ Line System ID #:_______________________________ Drain ELECTRICAL & CONTROLS MECHANICAL Steam Lines installed and sloped properly Primary Voltage (120 VAC) connected, unit grounded Venting installed properly <100ft equivalent length Control ON/OFF Security loop installed Gas supply line connected and purged of air...

  • Page 32: Venting Manufacturer

    VENTING MANUFACTURER • Venting must be listed as Categories III(GH 100) or IV(GH 200/300/400). • BH type venting made of stainless steel must be used. • Follow venting installation instructions recommended by manufacturer. FLEX-L INTERNATIONAL - HEAT-FAB INC. - www.heat-fab.com/ Telephone:(800)561-1980 - US &...

  • Page 33: External Controls Wiring Connections

    1 and 2 in order for the humidifier to operate. GH SERIES EXTERNAL CONTROLS WIRING CONNECTIONS LOW VOLTAGE TERMINAL STRIP Diagram number GHX3001 Rev. B January 2, 2001 - 29 -...

  • Page 34: Gh B/P Wiring Diagram

    Field wiring for GHB ON/OFF By others ON/OFF Controls in series 1 2 3 4 5 6 Field wiring for GHP 0-10 Vdc Modulation By Others ON/OFF Controls 0-10 Vdc Modulating Humidistat By Others in series Wall Or Duct 1 2 3 4 5 6 GH B/P Wiring Diagram - 30 -...

  • Page 35: Gh Stand Assembly

    GH STANDS SHOP DRAWING DETAIL A BOLT 3/8”-16” x 3/4” NUT U.N. COARSE 3/8” LOCK WASHER 3/8” ALL ABOVE TYPICAL ( X 24 ) MODEL DIMENSION Part # Model in (cm) in (cm) in (cm) 150-2412 GH 100 12.6 (32) 26.4 (67) 30.0 (77) 150-2413...
  • Page 38 REPLACEMENT PARTS GH SERIES...
  • Page 39 GH SERIES REPLACEMENT PARTS Item # Description Model Type GH 100 GH 200 GH 300 GH 400 170-8828 Knob, Tank lid -Hold down all models 170-5010 170-5012 170-5014 170-5014 Tank Lid all models 170-8214 170-8201 170-8210 Gasket, Tank Lid all models...
  • Page 40 REPLACEMENT PARTS GH Series...
  • Page 41 GH SERIES REPLACEMENT PARTS Item # Description Model Type GH 100 GH 200 GH 300 GH 400 Cabinet top door all models 150-2551 170-7222 170-7422 170-7422 Top, Control Cabinet all models 150-2546 170-7204 170-7404 Lock, c/w Keys all models 185-3104...
  • Page 42 NORTEC GHB, GHP, GHMC Humidifier Unit Type Serial Number Commissioning Software Version Location Responsible Internal no. or Tag: Remarks Date Time First maintenance Mid Season Annual Maintenance Working Hours Water Hardness Signature...
  • Page 43 - 39 -...

  • Page 44: Limited Warranty

    Any further warranty must be in writing, signed by an officer of THE COMPANY. THE COMPANY's limited warranty on accessories, not of NORTEC's manufacture, such as controls, humidistats, pumps, etc. is limited to the warranty of the original equipment manufacturer from date of original shipment of humidifier.
  • Page 45 NORTEC INDUSTRIES INC. NORTEC AIR CONDITIONING P.O. Box 698 INDUSTRIES LTD. 826 Proctor Avenue 2740 Fenton Road Ogdensburg, NY 13669 Ottawa, ON K1T 3T7 Website: www.humidity.com E-mail: nortec@humidity.com A WMH COMPANY...

This manual is also suitable for:

Gh 100Gh 200Gh 300Gh 400

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